<template>
  <div id="addGoods">
    <!-- 面包屑 -->
<el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
  <el-breadcrumb-item>添加商品</el-breadcrumb-item>
</el-breadcrumb>
<el-card class="box-card">
     <el-alert
    title="添加商品信息"
    type="info"
    center
    show-icon
    :closable="false"
    >
  </el-alert>
  <!-- 步骤条 -->
  <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
  <el-step title="基本信息"></el-step>
  <el-step title="商品参数"></el-step>
  <el-step title="商品属性"></el-step>
  <el-step title="商品图片"></el-step>
  <el-step title="商品内容"></el-step>
  <el-step title="完成"></el-step>
</el-steps>
<!-- 左边Tab区域 -->
<el-form :model="addForm" :rules="rules" ref="ruleForm" label-width="100px" label-position="top">
 <el-tabs :tab-position="tabPosition" v-model="activeIndex" :before-leave='beforeTabLeave' @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
        </el-form-item>
         <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
        </el-form-item>
         <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
        </el-form-item>
         <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
        </el-form-item>
         <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                expand-trigger='hover'
                @change="handleChange"></el-cascader>
        </el-form-item>
        
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">
         <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
            <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="item2" v-for="(item2,index2) in item.attr_vals" :key="index2" border style="margin:0 10px 0 0"></el-checkbox>
            </el-checkbox-group>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
          <el-input v-model="item.attr_vals"></el-input>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
        <!-- action的值代表api上传图片的地址 -->
        <el-upload
  class="upload-demo"
  action="http://127.0.0.1:8888/api/private/v1/upload"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  list-type="picture"
  :headers="headerObj"
  :on-success='handleSuccess'
  >
  <el-button size="small" type="primary">点击上传</el-button>
  <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
        <!-- 安装富文本框命令 npm install vue-quill-editor –-save  在main.js引入-->
        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
        <!-- 添加按钮 -->
        <el-button type="primary" style="margin-top:15px" @click="btnShop">添加商品</el-button>
    </el-tab-pane>
  </el-tabs>
</el-form>
</el-card>
<!-- 放大图片的预览对话框 -->
<el-dialog
  title="图片预览"
  :visible.sync="dialogVisible"
  width="50%">
  <img :src="previewPath" alt="" style="width:100%">
</el-dialog>
  </div>
</template>

<script>
var _ = require('lodash');
export default {
    data(){
        return{
            activeIndex:'0',
            tabPosition:'left',
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                //商品分类的所属数组，需要用逗号隔开里面数据
                goods_cat:[],
                //图片的数组
                pics:[],
                goods_introduce:'',
                attrs:[]
            },
            rules:{
          goods_name:[
            { required: true, message: '请输入商品名称', trigger: 'blur' },
            { min: 1, max: 10, message: '长度在 1 到 10 个字符', trigger: 'blur' }
          ],
         goods_price:[
            { required: true, message: '请输入商品价格', trigger: 'blur' },
          ],
           goods_weight:[
            { required: true, message: '请输入商品重量', trigger: 'blur' },
          ],
          goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat:[
            { required: true, message: '请选择商品分类', trigger: 'blur' },
        ]
        },
        // 下拉框分类数据
        cateList:[],
        //根据接口对应
        cateProps:{
            label:'cat_name',
            value:'cat_id',
            children:'children'
        },
        //接口返回的动态参数列表数据
        manyTableData:[],
        //接口返回的静态属性列表数据
        onlyTableData:[],
        //上传图片headers请求头对象
        headerObj:{
            Authorization:localStorage.getItem('token')
        },
        //放大图片的路径
        previewPath:'',
        dialogVisible:false
        }
    },
     created(){
        // 获取下拉框所有分类接口
        this.getCateList()
    },
    methods:{
        // 获取下拉框所有分类接口
        async getCateList(){
            const {data:res}=await this.$http.get('categories')
            if(res.meta.status!==200){
                return this.$message.error('获取商品分类列表失败')
            }
            this.cateList=res.data
        },
        //下拉框选择触发函数
        handleChange(){
            //判断只能选择第三级别
            if(this.addForm.goods_cat.length !==3){
                this.addForm.goods_cat=[]
            }
            console.log(this.addForm.goods_cat);
        },
        //标签页的切换事件  before-leave是文档方法有两个参数 一个即将进入 一个即将离开
        beforeTabLeave(activeName,oldActiveName){
            if(oldActiveName === '0' && this.addForm.goods_cat.length!==3){
                this.$message.error('请选择商品分类')
                return false
            }
        },
        async tabClicked(){
            // console.log(this.activeIndex);
            if(this.activeIndex === '1'){
                //进入商品参数中 发送获取参数列表请求  因为是动态参数 所以直接sel是many
                const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel: 'many' }})
                 if(res.meta.status !== 200){
                return this.$message.error('获取动态参数列表失败')
            }
                //因为接口返回的attr_vals是字符串 而用到多选框组的组件  所以需要使用forEach方法把字符串变成数组
                res.data.forEach(item=>{
                    item.attr_vals=
                     item.attr_vals.length === 0 ? []
                    :item.attr_vals.split(' ')
                })
                this.manyTableData= res.data
            }else if(this.activeIndex === '2'){
                //进入商品属性 发起请求
                const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel: 'only' }})
                if(res.meta.status !== 200){
                    return this.$message.error('获取静态属性列表失败')
                }
                this.onlyTableData= res.data
            }
        },
        //处理图片预览效果放大
        handlePreview(file){
            this.previewPath=file.response.data.url
            this.dialogVisible=true
        },
        //移除图片
        handleRemove(file){
            console.log(file);
            const filePath=file.response.data.tmp_path
            const i=this.addForm.pics.findIndex(x=>x.pic===filePath)
            this.addForm.pics.splice(i,1)
            console.log(this.addForm);
        },
        //监听图片上传成功的事件 也是element的方法
        handleSuccess(response){
            console.log(response);
            const picInfo={
                pic:response.data.tmp_path
            }
            this.addForm.pics.push(picInfo)
            console.log(this.addForm);
        },
        // 添加商品发请求
        btnShop(){
            this.$refs.ruleForm.validate(async valid=>{
          if(!valid){
              return this.$message.error('请填写必要的表单项')
          }
          // 发送添加请求前根据接口给字段做处理
          //深拷贝 搜索lodash下的cloneDeep方法  因为变成字符串后级联选择题需要数组 所以冲突 安装lodash命令npm i --save lodash 在上面script行为区导入var _ = require('lodash');
          const form=_.cloneDeep(this.addForm)
          form.goods_cat=this.addForm.goods_cat.join(',')
          //处理字段attr
          this.manyTableData.forEach(item=>{
              const newInfo={
                  attr_id:item.attr_id,
                  attr_value:item.attr_vals.join(' ')
              }
              this.addForm.attrs.push(newInfo)
          })
           this.onlyTableData.forEach(item=>{
              const newInfo={
                  attr_id:item.attr_id,
                  attr_value:item.attr_vals
              }
              this.addForm.attrs.push(newInfo)
          })
          form.attrs=this.addForm.attrs
          console.log(form);
          //商品的名称必须是唯一的  attr_name
          const {data:res}=await this.$http.post('goods',form)
          if(res.meta.status!==201){
            this.$message.error('添加商品失败')
          }else{
             this.$message.success('添加商品成功')
            this.$router.push('/goods')
          }

        })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length ===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>

<style lang="less" scoped>
#addGoods{
    .box-card{
        margin: 20px 0;
        .el-steps{
            display: flex;
            justify-content: center;
            margin: 15px 0;
          
           /deep/ .el-step__title{
            font-size: 13px;
        }
        }
       
       
    }
}
</style>